Windshield wiper



J. BROWN ET AL WINDSHIELD WIPER Filed Aug.x1s. 192e 2 sham-sham;v 2

Patented Feb. 2s, 1930 A y 1,748,055

UNITED 'STAT-Es PATENT oFFics J'YAMES BROWN AND WILLIAM D. VREDENB'URGH,OF YAKIMA, WASHINGTON WINDSHIELD WIPEB Application filed August 16,1928. Serial No. 299,988.

The invention relates to windshield Wipers provided with bosses 19-20carrying studs of the general type in which the wiper arm is 2'1-22 uponwhich sprockets' 23-24 are romoved alternately in opposite direct-ionstatably mounted, said bosses being also proacross the shield, throughthe instrumentality vided with inwardly projecting posts 25e-26 of achain continuousl driven in one directo which the ends of a guide rod 27are an- 55 tion, and it is the object of said invention chored. A slide28 which `ris U-shaped in to generally simplify and improve upon thetransverse section, is slidable along the rod construction of wipersofthis type.A 27, being held against accidental removal With the foregoingin view, the invention therefrom by a vertical screw or the like 29resides in the novel subject matter hereinwhich passes through thelongitudinal edge 6o after described and claimed, description heportionsof the slide behind the rod. Rigidly ing accomplished by .reference tothe accomsecured to and projecting laterally from the panying drawings.v Slide 28, is a stud 30 having a reduced outer Fig. 1 is a frontelevation partly in section. end 31. The wiper arm 18 issecured uponFig. 2 is a horizontal sectional View on this stud, by passing thereduced stud end 31 65 line 2-2 of Fig. 1. through an opening in theupper end of said Fig. 3 is a vertical transverse section on the arm andupsetting it as shown. y correspondingly numbered line of Fig. 1. Anendless chain 32 is trained around the Figs. 4, 5 and 6 are detail viewsillustratsprockets 23-24 and one of thesel sprockets ing the manner inwhich the slide-operated .is driven by-gearing 33 from a shaft 34 which7u link is reversed as its pivoted end passes maybe rotated in anydesired manner, for around either of the sprocket wheels. instance by anelectric motor (not shown).

In thedrawing above briefly described, the Shaft 34 is continuouslydrivenin the same preferred form of construction has been illusdirectionand it follows that the Achain 32 is -trated and. while suchconstruction will be similarly driven. A. link 35 is pivoted at one 75herein specifically described, it is to be unof its ends to the chain32, the link pivot 3 derstood that within the scope of the inven beingtransverse to said chain. The other tion as claimed, variations may bemade. end of the link 35 is formed with a longitu- We employ ahorizontally elongated, sheet dinal slot 37 through which the stud 30passes metal casing 10 to extend along the upper loosely, the link beinginclined and confined sa portion of the windshield frame. This casingbetween the Wiper arm 18 and the slide 28. Y, preferably .comprises aback plate 11 having The link 35 is of such a length that the a.forwardly projecting flange 12 forming a slide 28 will always trailbehind the link pvot casing bottom,a front plate 13 spaced some- 36 whenthe wiper is being operated, so that What in adVJlCe Of the Hang? 12 t01.6M@ a said link effectively pulls the slide along the S3 Slet 14, anda flange 15 Proleetmg rearwardly rod 27 without any danger Whatever ofcantfl'om. the UPR-er edge 0f Sad front Plate t0 ing it and causingbinding. The length of Prevlde a eesmg P0P the ends 0f the casmg thelink slot 37 is such as to permit reversing o bemg Provlded Wlthappropnate losures .Seh' ofthe link 35 when its pivot 36 travels aroundgglailll;-gggn esllldevr either of the sprockets 23-24, insuring trailtothe wind shield frame or to the back plate llg thte. Shdebeltmlgtlelhltk rgrdle? O 11. The lower edge of the front plate 13 is tml 1in m W E il a ,11 1S Fave llllg provided with an inwardly turnedbead 17 VY ne seen 1mm le Oregolng t al which bears against the outerside of the usual exceptdona y SlmlD e and lneXPenSne COF' as wiper arm18 to hold it inwardly toward the Struetlonha's .been PI'OYlded, yetthat Sald Wind Shield. v j construction will be elicient and 1n everyway The back plate 11 is secured by appropriate desirable. As abovestated, the details disfasteners to the wind shield frame and at C10Sedare preferable. However, within the its ends, the yinner side of thisback plate is Scope of the invention as claimed, it is t0 be rememberedthat minor variations maybe made. e

We claim: 1. In a device of the class described, a horizontallyelongated casing having a slot in its bottom, two sprockets mounted inthe ends of said casing, an endless chain trained around said sprockets,a' guide rod extending longitudinally between the upper and lowerreaches of said chain, means at theends of said rod. mounting itinspaced relation with all longitudinal sides of the casing, a slidemovable along said-rod,van arm secured to saidV slide andpassing throuhsaid slot, an inclined link vpivoted at one o? its ends to said chain onan axis transverse to the latter, the other end of said link having alongitudinal slot, a stud on said slide loosely received in said slot,and means for continuously driving one of said sprockets, said linkbeing of such length as to insure that the slide shall trail behind thelink pivot when being moved in either direction, said slot permittingreversal of the link incident to passage of the link pivot around eithervof said sprockets.

. 2. In a device of the class described, a horizontally elongated casinghavin a slot in/its bottom, two sprockets mounte inthe ends of saidcasing, an endless chainv trained ,i around said sprockets, `a uide rodextending longitudinally between t e upper and lowerr reaches of saidchain, means at the ends of said rod mounting it in spaced relationywith all longitudinal 4sides of the casing, `a slide movable along saidrod,a stud secured to and projecting laterally from said slide, an armsecured to the outer end of said' studv and passing through said slot,an inclined link pivoted at one of its ends to said chain on an axistransverse tothe latter, the other end of said link having alongitudinal slot through which' saidA stud passes loosely, andmeans forcontinuously driving one of said sprockets, said link being of suchlength as to insure that the slide shall trail behind the link pivotwhen being moved in either direcreversal of the link tion, said'slotpermitting k e lin pivot around front late, bosses. arranged on theinner side if of the ack plate, studs formed on said bosses,sprocketwheels mounted on said studs, posts projecting inwardly fromsaid bosses, a, 1ongitudinally disposed guide rod anchored 'at its endsto said posts, a slide movably mounted on said guide rod, a studprojecting laterally from said slide, a wiper arm secured at its upperend to said stud and projectingdownwardly through the slot in the casingbottom and having a slidino' engagement with the bead onthe lower edwhereby said arm is held inwardly toward the windshield, anA endlesschain trained around-said sprocket Wheels, a link ivoted at one end toone of the links of sai chain, a longitudinal slot in the `other end ofsaid.

link to loosely receive the stud on said slide,

ge of said front plate whereby the slide will trail behind the -linkwhen being moved in either direction, said slot permitting reversal ofthe link incident to passage of the link pivot. around-either of saidsprocket wheels` and means for continu-v ously driving said chain.

In testimony-whereof aiiixed our siv natures. l' JAM S BROWN.' l a 'eWILLIAM D. VREDENBURGH.'

we have 'hereunto windshield frame and having -a forwardlyl lproject-ing flange forming the bottom ofthe i

